Hello,
I am hoping the Mark community can help me with a question I have regarding the estimation of turkey poult survival:
I am working to estimate poult survival to 4 weeks of age based on frequent counts of unmarked poults located with a radio-marked hen. Constraints in the field (e.g. poor lighting, brood mixing, broods flushing before being located) result in counts where detection is either very reliable (brood observed roosted next to the marked hen) or completely unreliable (brood flushes before we are close enough to get a visual). This, combined with large brood sizes, makes the Young Survival from Marked Adults an inappropriate framework for this question.
As such, my intent is to discard "useless" counts and treat data from counts where I am confident we detected the entire brood as ragged telemetry data within the nest survival module. At least a few studies have used this approach (e.g. Garrick et al. 2017, Amundson and Arnold 2011). I've run some of my preliminary models without issue.
The issue lies in dealing with the lack of independence between brood mates. I intended to estimate overdispersion using bootstrap simulations within Mark. However, the nest survival model is not listed among the supported data types for simulation. As I mentioned above, I believe others have used this method as I am proposing, so I am a bit confused. Is it possible this functionality was once available but no longer exists for this model type?
Thanks much,
Michael